JPH0688654A - Absorption heat pump device - Google Patents

Abstract

PURPOSE:To relieve or solve the trouble caused by the emergency stop of an absorption heat pump provided with a circulation system through which a heat treating fluid is circulated by the heat exchanger including a high temp. regenerator and a passage through which a heat treatable fluid is passed by the heat exchanger. CONSTITUTION:The heat treating fluids such as absorbing liquid 2a and refrigerant liquid 24a are circulated through a low temp. heat exchanger 13, a high temp. heat exchanger 9, a high temp. regenerator 5, a low temp. regenerator 11, a condenser 23, an evaporator 26 and an absorber 1. A flow passage is provided for the heat treatable fluids such as cooling water 32a and chilled water 36a. The fluid operating conditions are sensed by a temp. sensor D1, a pressure sensor Dn and temp. sensors D2 and D3. When the value sensed by each sensor and the corresponding value of concentrated liquid obtained from such sensed values exceed their respective reference values, an excess is computed by CPU 50, the degree of heating is reduced by a portion equivalent to the excessive amount as a first heat reducing operation and, if any abnormal condition persists, a second heat reducing operation is performed to prevent progress of the abnormal condition to meet the predetermined condition correcting requirements.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an absorption refrigerating machine, an absorption chiller-heater or the like which performs a required heat exchange operation by an absorption heat pump action using an absorption liquid in which a heat absorbing agent is mixed with a vaporizable refrigerant. In the invention, it is referred to as an absorption heat pump device).

[0002]

2. Description of the Related Art As an apparatus of this type, for example, an absorption heat pump apparatus using an absorption liquid such as an aqueous solution of lithium bromide mixed with lithium bromide as an absorbent and a refrigerant as water is well known, and the absorption heat pump shown in FIG. Some are configured like the device 100.

In FIG. 6, a thick solid line portion is a liquid pipe of a refrigerant liquid or an absorbing liquid, and a double line portion is a vapor pipe of a refrigerant vapor. First, a circulation system of the absorbing liquid is provided at the bottom of the absorber 1. A description will be given starting from the accumulated low-concentration absorption liquid, that is, the rare liquid 2a.

The dilute liquid 2a enters the high temperature regenerator 5 via the pipe 4 by the pump 3. Since the high temperature regenerator 5 is heated from below by the heater 6 such as a burner, the refrigerant contained in the dilute liquid 2a evaporates and the medium temperature of the absorbing liquid having a high temperature, that is, the intermediate The liquid 2b and the refrigerant vapor 7a are separated.

The high temperature intermediate liquid 2b enters the high temperature heat exchanger 9 through the pipe 8. In the high temperature heat exchanger 9, the high temperature intermediate liquid 2
b applies heat to the dilute liquid 2a passing through the pipe 4 to radiate it, and after the temperature has dropped, it enters the low temperature regenerator 11 via the pipe 10.

In the low temperature regenerator 11, since the refrigerant vapor 7a is sent to the heat exchanger 11A in the low temperature regenerator for heating the intermediate liquid 2b via the pipe 21 for heating, it is contained in the intermediate liquid 2b. The refrigerant that has evaporated evaporates and is separated into the high-concentration absorbing liquid that has become high temperature, that is, the concentrated liquid 2c and the refrigerant vapor 7b.

The high temperature concentrated liquid 2c enters the low temperature heat exchanger 13 via the pipe 12. In the low-temperature heat exchanger 13, the high-temperature concentrated liquid 2c gives heat to the dilute liquid 2a passing through the pipe 4 to radiate the heat, and after reaching an intermediate temperature, is formed in the tray in the absorber 1 via the pipe 14. It enters into the spraying device 1A, and sprays it from a large number of holes of the spraying device 1A.

The concentrated liquid 2c that has been sprayed is the heat exchanger 1 in the absorber.
The B is circulated by the cooling water 32a. Concentrated liquid 2
When flowing down the outside of the in-absorber heat exchanger 1B, c absorbs and dilutes the refrigerant vapor 7c coming from the adjacent evaporator 26, returns to the low temperature dilute liquid 2a, and completes one cycle of the absorbing liquid. The cycle of ending is repeated.

Next, the circulation system of the refrigerant will be described with the refrigerant vapor 7C having entered the absorber 1 as a starting point. The refrigerant vapor 7c is
As described in the absorbent circulation system described above, the rare liquid 2 is absorbed by the dispersed concentrated liquid 2c from the spraying device 1A in the absorber 1.
It enters into a and becomes the refrigerant vapor 7a in the high temperature regenerator 5.

The refrigerant vapor 7a enters the low-temperature regenerator internal heat exchanger 11A via the pipe 21 and gives heat to the intermediate liquid 2b to radiate the heat and condense into the refrigerant liquid 24a. Through the bottom of the condenser 25.

The condenser 23 enters the refrigerant vapor 7b through a number of passages 11B between the adjacent low temperature regenerator 11.
Is cooled with the cooling water 32a passing through the heat exchanger 23A in the condenser, and the refrigerant vapor 7b is condensed into the low-temperature refrigerant liquid 24a. The refrigerant liquid 24a enters the evaporator 26 via the pipe 25 and becomes the refrigerant liquid 24b.

The pump 27, the refrigerant liquid 24b, the conduit 28
A. Spraying device 26A formed by a tray via the pipe line 28
, And spraying from a large number of holes of the spraying device 26A is repeated. The sprayed refrigerant liquid 24b cools the cooled water 35a passing through the evaporator internal heat exchanger 26B. During this cooling, the refrigerant liquid 24b absorbs heat from the water to be cooled 36a and evaporates to become the refrigerant vapor 7c, and then passes through a number of passages 26C between the adjacent absorbers 1 and then the absorber. The circulation is repeated by returning to 1 and completing one round of the refrigerant.

Each heat exchanger 1B ・ 11A ・ 23A ・ 26B
Is formed of, for example, a meandering tube or the like to obtain required cooling and heat radiation.

Further, for operation switching, the high temperature intermediate liquid 2b to be put into the high temperature heat exchanger 9 is bypassed to the absorber 1 by the conduit 41 and the opening / closing valve 41A for opening / closing this bypass. The refrigerant vapor side path for returning to the absorber 1 by the conduit 42 and the on-off valve 42A that opens and closes the refrigerant vapor 7a to be put into the low temperature regenerator 11 and the absorbing liquid side path system to be returned. System and the refrigerant liquid 24b to be sprayed from the spraying device 26A
The refrigerant liquid side path that bypasses the refrigerant liquid 24b by the conduit 43 that bypasses between the conduit 28 and the conduit 4 and the on-off valve 43A that opens and closes this bypass and mixes with the absorbing liquid 2a. The system is provided.

The operation of each system is performed by opening / closing valves 41A, 42A, 4A.
3A is closed, each side passage 41, 42, 43 is closed, and each circulation system is operated to cool the water 36a to be cooled supplied from the pipe 35 by the heat exchanger 26B in the evaporator. The cooling water 36b is supplied from the pipe 37.

Further, the cooling water 32a is made to flow from the pipe line 31 to the heat exchanger 1B in the absorber and the heat exchanger 23A in the condenser, and the cooling water 36b is supplied from the evaporator 26 so as to perform the double-effect cooling operation. And on-off valves 41A, 42A, 43A
To open the side passages 41, 42, 43 to stop the functions of the low temperature regenerator 11 and the condenser 23, and to stop the flow of the cooling water supplied from the pipe 31.
Furthermore, by replacing the water to be cooled 36a from the pipe 35 with the water to be heated, it is possible to switch to the heating operation in which high temperature warm water is supplied from the pipe 37 instead of the cooling water 36a. It is composed.

The above-described cooling operation, that is, the operation in which the high-temperature regenerator 5 and the low-temperature regenerator 11 perform a double regeneration operation, and the heating operation, that is, the heating operation only in the high-temperature regenerator 5, are performed smoothly. In order to do so, it is necessary to adjust the concentration of the absorbent in the absorbing liquid, that is, the concentration of the absorbing liquid at the time of switching.

Further, the pipe lines 81 to 83 are portions forming an overflow pipe, and the pipe line 81 is, for example, when the absorbing liquid is crystallized and enters the low temperature heat exchanger 13, that is, when the flow rate of the concentrated liquid 2d is reduced. Is for bypassing the concentrated liquid 2d from the low temperature regenerator 11 to the absorber 1, and when this bypass operation is not performed, that is, normally, the dilute liquid fed into the conduit 4 by the pump 3 is used. By accumulating 2a in the U-shaped pipe 82 via the pipe 83, the refrigerant vapor 7b is blocked so as not to enter the absorber 1. Therefore, the pipeline 8
3 is made extremely thin with respect to the pipeline 4, and the pipeline 4
Most of the diluted liquid 2a is sent to the high temperature regenerator 5.

Further, the pipe line 84 absorbs the absorption liquid in the absorption liquid unless the absorption liquid passes through the pipe line between the opening / closing valve 41A of the pipe line 41 and the absorber 1 while the opening / closing valve 41A is closed. Since the agent is crystallized and the pipeline is clogged, it is a pipeline for dividing the dilute liquid 2a sent to the pipeline 4 by the pump 3 by a small amount. Therefore, like the conduit 83, the conduit 84 is extremely thin with respect to the conduit 4.

As a specific configuration of the absorption heat pump device 100 described above, one having a configuration as shown in FIG. 7 (hereinafter referred to as "first conventional technology") is disclosed in "The absorption cold / hot water by the applicant of the present application, Sanyo Electric Co., Ltd. in July 1990. Machine, absorption heat pump device C
It is disclosed in "Series Catalog '90 -7", "Knowledge of Practical Use of Air Conditioning Equipment" issued by Ohmsha in February 1989.

In FIG. 7, the parts denoted by the same reference numerals as those in FIG. 6 have the same functions as those explained in FIG.

Further, in the absorption heat pump device 100 having the above-described structure, as shown in FIG. 8, a secondary condensing function is provided to improve the heating capacity of the warm water 32b, and the temperature of the required pipeline is increased. By providing a controller that controls the opening / closing valve of the required pipeline and the fuel supply valve of the heater 6 based on the detection value obtained by detecting the However, a configuration (hereinafter, referred to as a second conventional technique) configured to stably heat the warm water 32b is disclosed in Japanese Patent Application Laid-Open No. 3-79625, which is a prior application of the applicant of the present application, Sanyo Electric Co., Ltd. is there.

In FIG. 8, portions designated by the same reference numerals as those in FIG. 6 are portions having the same functions as those explained in FIG. 6, and constituent portions different from the constitution of FIG. 6 are the following portions. .

A pipe line 61 branched from the pipe line 21 guides the refrigerant vapor 7a to the auxiliary condenser 62, and the pipe line 34
Is changed to the pipe line 34A, the heated water 32b is guided to the heat exchanger 62A in the auxiliary condenser 62 to be heated, and the heated water 32b
A heating path for the cooling water 32a is additionally provided so as to supply the heating water 32c having a higher temperature than the pipe line 34B.

The refrigerant vapor 7e, which has introduced the refrigerant vapor 7a into the auxiliary condenser 62, heats and radiates the heating water cooling water 32a introduced into the heat exchanger 62A, and after condensation, becomes the refrigerant liquid 24c. When the opening / closing valve 63A of the pipe 63 is open, it is led to the condenser 23 and is combined with the refrigerant liquid 24a. When the opening / closing valve 64A of the pipe 64 is open, the high temperature regenerator 5 is used.
One of the routes is introduced, that is, the mixed liquid is introduced into the concentrated liquid 2b.

Further, the heater 6 is configured so that the heating amount can be adjusted by the heating adjuster 65, and the temperature detector 66 and the temperature detector 6 are provided in the pipe 35 and the pipe 34B, respectively.
Each detection signal detected by 7 is guided to a controller 68 via a line (not shown) to control the adjustment of the heating adjuster 65 and the opening / closing of the opening / closing valves 43A, 63A, 64A. In the second conventional technique, the water to be cooled 36 supplied from the pipe 35 is provided.
The a or the water to be heated which is given instead is called heat source water, and in the case of heating operation, the auxiliary condenser 62 is put into the operating state and is obtained from the pipe line 34 in the first prior art as described above. Since the heated water 32b and the heated water 32c heated by the auxiliary condenser 62 are supplied from the conduit 37A, the heated water 32d having a temperature higher than that in the case of the first conventional technique can be supplied.

[0027]

In the absorption heat pump device as described above, since the absorbent is alkaline, each part is corroded when the concentration of the absorption liquid becomes abnormally high, and the absorption liquid crystallizes to damage each part. In addition, since the circulation amount of the absorbing liquid is decreased and the efficiency of the absorption heat pump device is decreased, the control according to the second conventional technique generally has an abnormal detected value in a required portion. In that case, an abnormal stop function is provided at that time to immediately and completely stop the operation of the device.

However, in the conventional abnormal stop function,
Even if the current abnormality is caused by a transient phenomenon in the control process due to a sudden change in the supply and demand of the heated liquid to be operated, or immediately, even if it does not cause a serious failure, the Therefore, if the device is used in a process such as food manufacturing, the maintenance process for the product in process cannot be performed, and the process of There are inconveniences, such as degrading things and causing tremendous damage.

Therefore, there is a problem that it is desired to provide a simple device that does not have such inconvenience.

[0030]

SUMMARY OF THE INVENTION The present invention is directed to a circulation system for circulating a heat-operated fluid such as an absorbing liquid and a refrigerant liquid through a plurality of heat exchanging devices including a high temperature regenerator as described above, A flow path for circulating the heated operating fluid that cools or heats through the required parts of the replacement equipment is provided, and the required control is performed by the detection value obtained by detecting the operating state of the required part. An absorption heat pump device to perform, the temperature of the heated operating fluid obtained by cooling or heating in the above control in a steady state, that is, based on the relationship between the operated temperature and the heating degree of the high temperature regenerator, Abnormal range setting means for setting an abnormal range of the degree of heating, temperature of the absorbing liquid and pressure of the refrigerant vapor in the high temperature regenerator, and concentration of the concentrated liquid of the absorbing liquid in the circulation system or corresponding to the concentration Find value and One of the obtained detection values exceeds the reference value set in advance, that is, the excess amount detection means for obtaining the excess amount, and the control in the steady state based on the above excess amount. The reduction control means for reducing the heating degree of the high temperature regenerator 5 by the amount corresponding to the above excess amount, the relationship between the heating degree reduced by the above reduction and the operated temperature falls within the abnormal range. A structure provided with an error display means for displaying an error when the device is on, or
Instead of the abnormality display means, the relationship between the degree of heating reduced by the heating reduction and the operated temperature is a time value obtained by measuring the time in the abnormal range,
When a predetermined time value is exceeded, a second reduction control unit that performs a second heating reduction that further reduces the heating degree by a predetermined amount, and a predetermined time after performing the second heating reduction,
When any of the above detection values exceeds each preset upper limit value above each reference value, an abnormal stop control means for stopping the operation of the device is provided. The above problems can be solved.

[0031]

[Function] In advance, from the standpoint of safety and the abnormal range of the heating degree as seen from the relationship between the temperature of the operating fluid to be heated and the heating degree of the high-temperature regenerator due to controlled cooling and heating in the steady state, Each upper limit value to be limited is set, on the other hand, one of the detected values of the absorption liquid temperature / refrigerant vapor pressure of the high temperature regenerator and the concentrated liquid concentration of the absorption liquid in the circulation system, If there is an excess amount that exceeds each preset reference value,
Since the degree of heating is reduced by an amount corresponding to this excess amount, the reduced operation state is usually continued.

However, if it enters the abnormal range, the first
As a countermeasure against the above, as in the first embodiment, an abnormality is displayed and a warning is given to the user. With this warning, the user can perform the operation of the apparatus by using a comfortable shutdown procedure that he / she knows. The operation is performed so as to reduce the above, and it is possible to prevent an excessive failure.

Further, by reducing the heating degree as described above,
When the abnormality is not resolved and remains in the abnormal range for more than the predetermined time, as the second countermeasure, the heating degree is set to the first predetermined amount as in the second embodiment. Only reduced,
A predetermined time is measured to check whether it is due to a transient control state. When each detected value exceeds the reference value even after the lapse of the predetermined time, the heating degree is further reduced by the second predetermined amount, and similarly, the predetermined time is measured and the transitional state has passed. After that, when the upper limit reference value is exceeded, it is determined that the abnormality is a complete abnormality that cannot be resolved even by the second heating amount reduction, and the operation of the device is stopped. In some cases, recovery is performed between the first heating reduction and the second heating reduction, and in the case of an abnormality or transient that does not lead to a serious failure, these heating reductions reduce the capacity. , So that the operation can be continued until the required time.

[0034]

EXAMPLES Examples will be described below with reference to FIGS.
In these figures, the parts denoted by the same reference numerals as those in FIGS. 6 to 8 have the same functions as those described with reference to FIGS. 6 to 8.

[First Embodiment] First, the first embodiment will be described with reference to FIGS.
This will be described with reference to FIG. The configuration of the first embodiment is the same as the first embodiment described above.
A plurality of heat exchange devices including the high temperature regenerator 5 as described in the related art, that is, the low temperature heat exchanger 13, the high temperature heat exchanger 9, the high temperature regenerator 5, the low temperature regenerator 11, the condenser 23, and the evaporator. 26. Heated operation for cooling or heating through a circulation system that circulates a heat-operation fluid such as an absorption liquid and a refrigerant liquid through the absorber 1 and the like, and a required one of heat exchange devices In an absorption heat pump device provided with a function of monitoring the operating state of heat exchange devices as described in the second conventional technique as well as providing a flow path for circulating a fluid, cooling in the above control in a steady state or The abnormal range of the heating degree is set, for example, as shown in FIG. 5, based on the temperature of the heated operating fluid obtained by heating, that is, the relationship between the operating temperature and the heating degree of the high temperature regenerator. Abnormal range setting means and high temperature Each detected value obtained by detecting the temperature of the absorbing liquid and the pressure of the refrigerant vapor in the generator 5, and the concentration of the concentrated liquid of the absorbing liquid in the circulation system or the corresponding value corresponding to this concentration, that is, for example, The detected values of the temperature detector D1 and the pressure detector Dn, and the temperature detector D2 and the temperature detector D3.
An excess amount detecting means for obtaining an amount in which any one of the detected values corresponding to the concentration of the concentrated liquid obtained by calculating from the detected values exceeds the reference value set in advance, that is, the excess amount. And a reduction control means for reducing the heating degree by the control in the steady state based on the above excess amount by an amount corresponding to the above excess amount, the heating degree reduced by the above reduction, and the operated The configuration is provided with abnormality display means for displaying an abnormality when the relationship with the temperature, for example, the temperature of the cooling water 36b is within the above-mentioned abnormal range.

Specifically, as shown in FIG. 1, the high temperature regenerator 5
In contrast, the temperature detector D1 detects the temperature t1 of the absorbing liquid of the high temperature regenerator 5, for example, the temperature of the diluted liquid 2a, as the "high temperature regeneration temperature", and the pressure detector Dn detects the high temperature regenerator. The pressure p1 of the refrigerant vapor 7a of No. 5 is detected.

For the low temperature regenerator 11 and the condenser 23, the temperature t of the concentrated liquid 2d in the conduit 12 is set by the temperature detector D2.
2 as "concentrated liquid temperature", and the temperature detector D3 determines the temperature t3 of the refrigerant liquid 24a in the conduit 25 as "refrigerant condensing temperature".
To detect as.

For the evaporator 26, the temperature t4 of the cooling water 36b in the conduit 37 is detected as the "cooling outlet temperature".
Then, the data of these respective detection values t1 to t4.p1 are given to a processing controller (CPU in the present invention) 50 by a microcomputer to perform required processing control.

Further, this processing control requires the data of the heating degree by the heating regulator 65 controlling the heating degree of the heater 6 of the high temperature regenerator 5, and the adjustment state of the heating regulator 65 is detected. The heating degree h1 is applied to the CPU 50.

The detection signals detected by the temperature detectors D1 to D4 and the pressure detector Dn and the detection signal of the heating regulator 65 are applied to the input / output port 51 of the CPU 50 as shown in FIG. Each value obtained by A / D converting the values t1 to t4.p1.h1 (for easy understanding of the description, t1 to t4.p1.
(h1 is used as it is) is temporarily stored in the work data memory 52 of the CPU 50. The CPU 50 performs the processing according to the flow shown in FIG. 3 based on the arithmetic processing by the program stored in the processing memory 54.

In the reference data memory 53 of the CPU 50,
As shown in FIG. 5, in the control during the operation in the steady state, the data capable of calculating the abnormal range AU which is considered to cause the abnormal operation, or the data obtained by calculating the abnormal range AU are stored.

In FIG. 5, the heating degree h1 on the vertical axis is the degree to which the high-temperature regenerator 5 is heated by the heater 6, that is, the adjustment degree of the heating adjuster 65. When a burner is used for the heater 6, , The opening of the fuel valve. The load on the horizontal axis is
For example, it is the temperature of the cooling water 36b, that is, the cooling water outlet temperature t4.

Then, centering on the set value tc with respect to the temperature t4, the relationship between the heating degree and the load degree operates in a substantially proportional range, that is, the proportional band P is changed by 100%, and the heating degree h1 corresponding thereto is changed. Shows the relationship when the heating degree control is performed with the change of 0 to 100%.

In this case, when tracing the control line up to the heating degree of 50% with respect to the ideal control state, the range of the loading degree of 50% or more, that is, the set value tc of the cooling water 36b or more is
Range where the driving operation becomes abnormal, that is, abnormal range AU
Can be regarded as.

The calculation procedure of the calculation formula for calculating the abnormal range AU in FIG. 5 from the heating degree h1 and the cooling water 36b is stored in the processing memory 54, and the set value tc is stored in the reference data memory 53.
I remember it.

Further, the allowable values for the respective detected values t1 to t4.p1 calculated from the steady state operation are set to the reference values ts1 to ts1.
ts2 · ps1 is stored in the reference data memory 53 from the setting input circuit 70.

The process control flow will be described below. In FIG. 3, ◆ In step [SP1], each of the above temperature detection values t1 to t
4 · p1 · h1 is temporarily stored in the work data memory 52.

In step [SP2], the temperature detection value t2 and the temperature value t3 are read from the work data memory 52 as data for calculating the concentration of the concentrated liquid 2d,
A corresponding program PH1A corresponding to the concentrated liquid concentration PH1 is calculated and temporarily stored in the work data memory by an arithmetic program stored in the work memory 53 for solving the following equation.

In step [SP3], the detected temperature value t1, the detected pressure value p1, and the corresponding value P are read from the work data memory 52.
While reading out H1A, each reference value ts1 to ts4 · ps1 is read out from the reference data memory 53, and a comparison operation is performed to detect detected temperature value t1, detected pressure value p1, and corresponding value PH1.
Any of A corresponds to the corresponding reference values ts1 to ts
Calculate the excess amount OV1 that exceeds 4 ps1. And
When the excess amount OV1 does not exist, the process proceeds to [SP5], and when the excess amount OV1 exists, the process proceeds to [SP4].

In step [SP4], the apparatus is operated in a steady operating state, and the process returns to [SP1].

◆ In step [SP5], the excess amount OV1
Corresponding to, for example, 10% of FIG. 5 as the predetermined heating amount, and the predetermined heating amount multiplied by the excess amount OV1,
The heating controller 65 is operated by giving an instruction to reduce the heating amount h1.

In step [SP5], data for calculating the abnormal range AU, for example, the abnormal range A in FIG.
As the data for calculating U, the detected temperature value t4 and the heating degree h
1 is fetched and stored in the value work data memory 52.

In step [SP7], the set value tc of the cooling water temperature is read from the reference data memory 53, the temperature value t4 and the heating degree h1 are read from the work data memory 52, and the abnormal range AU is read from the relationship of FIG. Is calculated.

In step [SP8], it is determined whether or not the heating degree h1 is within the abnormal range AU by comparison calculation. And, if it is not within the abnormal range AU, [SP
9] and if it is in the abnormal range AU, [SP
Return to 1].

In step [SP9], the display 60 is
The warning indicator lamp is turned on, and the horn 62 is sounded to issue a warning to draw the attention of the observer. With this warning, the user can operate the equipment with reduced capacity by using a reasonable shutdown procedure that he / she knows, and can prevent an excessive failure.

In the above procedure, if there is no abnormality,
The CPU 50 has [SP1] to [SP4] or [SP]
1] to [SP8] are repeated at a predetermined cycle, for example, every 10 seconds.

[Second Embodiment] Next, a second embodiment will be described with reference to FIG.

In the configuration shown in FIG. 4, each device and each detection device are arranged in the same manner as in the above-mentioned first embodiment.
Instead of the above-mentioned abnormality display means in the embodiment, the relationship between the heating degree reduced by the heating reduction in [SP5] and the operated temperature is within the abnormal range AU by the determination in [SP8]. A second reduction control means for performing a second heating reduction for further reducing the heating degree by a predetermined amount when the time value obtained by measuring the remaining time exceeds a predetermined time value; After a predetermined time after performing the heating reduction, if any of the above detection values exceeds the preset upper limit values above the reference values, the operation of the device is stopped. An abnormal stop control means for stopping is provided.

Specifically, in addition to the data of the first embodiment described above, the reference data memory 53 has the respective upper limit values tu1 to t1 of the detected values t1 to t4.p1 calculated from the safety limit.
u4 and pu1 are stored in the reference data memory 53 from the setting input circuit 70.

The process control flow will be described below. In FIG. 4, up to [SP7] is the same as in the case of the first embodiment, that is, the case of FIG. 3, and after [SP8] is different, so the processing control after [SP8] will be described.

In step [SP8], it is determined by comparing whether or not the heating degree h1 is within the abnormal range AU. And, if it is not within the abnormal range AU, [SP
9] and if it is in the abnormal range AU, [SP
Return to 1].

In step [SP9], the clocks in the CPU 50 are counted for a predetermined time, for example, about 1
Time about 0 minutes. If the reason why the heating degree h1 is within the abnormal range AU is due to a transient state during this timekeeping, the heating degree h1 is not within the abnormal range A with the passage of time.
Since the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1A may be within the respective reference values ts1 to ts4 · ps1 after exiting from U, the time for waiting for such a transient state to subside. Is.

◆ Step [SP10] ・ [SP11] ・
In [SP12], the above [SP1] / [SP2] [S
P3] is performed, and in [SP12],
When there is no excess amount OV1, the process returns to [SP1] and the excess amount OV
If there is V1, the process proceeds to [SP13].

In step [SP13], [SP5]
Similarly, the amount corresponding to the excess amount OV1, for example, 10% in FIG. 5 is set as the predetermined heating amount, and the excess amount O is added to the predetermined heating amount.
The heating regulator 65 is operated by giving an instruction to reduce the heating amount h1 by an amount obtained by multiplying V1.

In step [SP14], [SP9]
Similarly, the clock in the CPU 50 is counted to measure a predetermined time, for example, about 10 minutes. In this timing, when the reason why the excess amount OV1 occurs is due to a transient state, the detected temperature value t
1. The detected pressure value p1 and the corresponding value PH1A are the reference values ts
Since it may fall within the range of 1 to ts4 · ps1, this is the time for waiting for the transitional state to subside.

In steps [SP15] and [SP16], the same processing as the above [SP1] and [SP2] is performed, and the process proceeds to [SP17].

In step [SP17], the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1A are read from the work data memory 52, and the upper limit values tu1 to tu4 above the respective reference values are read from the reference data memory 53.・ Pu1
Is read out, and a comparison operation is performed, and any one of the detected temperature value t1, the detected pressure value p1, and the corresponding value PH1A exceeds the corresponding reference value tu1 to tu4.pu1 in excess amount OV2.
Is calculated. If there is no excess amount OV2 [SP
1], and if there is the excess amount OV1, the process proceeds to [SP18].

◆ In step [SP18], the display 60
While turning on the alarm indicator light and sounding the horn 62 to issue a warning to alert the observer to the fact that there is a completely abnormal condition, and the stop control circuit 71 controls the operation of the entire device. A command signal to stop the operation is sent to the control device that is operating, and the heating regulator 65 is controlled to stop.

In the above procedure, if there is no abnormality,
The CPU 50 has [SP1] to [SP4] or [SP]
1] to [SP8] are repeated at a predetermined cycle, for example, every 10 seconds.

[Modification] The present invention can be modified and implemented as follows. (1) A detector that can directly measure the concentration of the concentrated liquid 2d with a densitometer, for example, a detector using a PH meter. Configured to detect by.

(2) In the configuration in which the operation can be switched between the cooling operation and the heating operation, the cooling operation / heating operation switching signal obtained based on the switch operation for switching or the command signal is as shown in FIG. In addition, by giving the reference value to the CPU 50, each reference value for each temperature difference value is switched to each reference value for the heating operation and each reference value for the cooling operation.

(3) CP which controls the operation of the device
U and the CPU 50 are configured as one CPU.

[0073]

According to the present invention, as described above, the heating degree of the operating fluid to be heated and the heating degree of the high temperature regenerator are controlled by the controlled cooling and heating in the steady state in advance. The abnormal range, the reference value for each detected value, and the upper limit value for safety are set.On the other hand, the absorption liquid temperature and refrigerant vapor pressure of the high temperature regenerator and the concentrated liquid of the absorption liquid in the circulation system are set. If there is an excess amount in which one of the detected values of concentration and each exceeds the preset reference value, the heating degree is reduced by an amount corresponding to this excess amount and the reduced operation state is continued. However, if this reduction goes too far and falls within the abnormal range, as a first countermeasure, as in the first embodiment,
It gives an alarm by displaying an error.

Therefore, the user knows that the alarm has entered the abnormal state, operates the device with reduced capacity by using the procedure of the operation shutdown which he / she knows, and does not cause excessive failure. While operating, it is possible during this time for the maintenance treatment of process items.

Further, by reducing the heating degree as described above,
When the abnormal condition is not resolved and the abnormal condition continues for a predetermined time or more, as a second countermeasure, the heating degree is reduced by the first predetermined amount and the predetermined time is measured as in the second embodiment. If each detected value exceeds the reference value even after the transitional control state is settled, the heating degree is further reduced by the second predetermined amount, and the transitional state is settled in the same manner. After that, when it exceeds the upper limit reference value, it is determined that the abnormality is complete for the first time, and the operation of the apparatus is stopped.

Therefore, in the case of a transient abnormality in control, it is restored between the first heating reduction and the second heating reduction, and in the case of an abnormality or a transient that does not result in a serious failure, , In the state where the capacity is lowered by reducing these heatings,
While driving so as not to cause excessive failure, during this,
It is possible to perform security processing of process processes.

Further, in the process work of the 24-hour continuous process, even if an abnormality occurs at night, there is a feature that the service person can be operated and waited until the service person arrives the next morning.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention.

FIG. 2 is a block configuration diagram of a main circuit of the present invention.

FIG. 3 is a processing flowchart of the first embodiment of the present invention.

FIG. 4 is a processing flowchart of the second embodiment of the present invention.

FIG. 5 is a set condition diagram of the operation of the main part of the present invention.

FIG. 6 is a block diagram of a conventional technique.

FIG. 7 is a block diagram of a conventional technique.

FIG. 8 is a block diagram of a conventional technique.

[Explanation of symbols]

 1 Absorber 1A Spraying device 1B Heat exchanger inside absorber 2a Dilute liquid 2b Intermediate liquid 2d Concentration 3 Pump 4 Pipe line 5 High temperature regenerator 6 Heater 7a Refrigerant vapor 7b Refrigerant vapor 7c Refrigerant vapor 7e Refrigerant vapor 8 Pipeline 9 High Heat exchanger 10 Pipeline 11 Low temperature regenerator 11A Low temperature regenerator internal heat exchanger 11B Passage 12 Pipeline 13 Low temperature heat exchanger 14 Pipeline 21 Pipeline 22 Pipeline 23 Condenser 23A Condenser heat exchanger 24a Refrigerant liquid 24b Refrigerant liquid 24c Refrigerant liquid 25 Pipeline 26 Evaporator 26A Spraying device 26B Evaporator heat exchanger 27 Pump 28 Pipeline 31 Pipeline 32a Cooling water 32b Heating water 32c Heating water 33 Pipeline 34 Pipeline 34A Pipeline 34B pipe Channel 35 Pipeline 36a Cooled water (heat source water) 36b Cooling water 37 Pipeline 41 Pipeline 41A Open / close valve 42 Pipeline 42A Open / close valve 43 Pipeline 43A Open / close valve 50 CPU 51 Input / output port 52 Work data memory 53 Reference data memory 54 Processing memory 61 Pipe line 62 Auxiliary condenser 62A Heat exchanger 63 Pipe line 63A Open / close valve 64 Pipe line 64A Open / close valve 65 Heat regulator 66 Temperature detection Device 67 Temperature detector 68 Controller 70 Input setting circuit 71 Stop control circuit 81 Pipe line 82 Pipe line 83 Pipe line 84 Pipe line 100 Absorption heat pump device D1 Temperature detector D2 Temperature detector D3 Temperature detector D4 Temperature detector Dn Pressure Detector

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hidekazu Nakajima 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Prefecture Osaka Gas Co., Ltd. (72) Ryuichiro Kawakami, 4-chome, Hirano-cho, Chuo-ku, Osaka-shi, Osaka 1-2 No. 2 in Osaka Gas Co., Ltd. (72) Inventor Masahiro Furukawa 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Sanyo Electric Co., Ltd. (72) Eiichi Enomoto 2-18 Keihan Hondori, Moriguchi City, Osaka Prefecture Address within Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A circulation system for circulating a heat-operated fluid such as an absorption liquid and a refrigerant liquid via a plurality of heat exchange devices including a high temperature regenerator, and a required one of the heat exchange devices. An absorption heat pump device that provides a flow path through which the heated operating fluid that cools or heats is provided, and that performs the required control based on the detection value obtained by detecting the operating state of the required part. The abnormal range of the heating degree is set on the basis of the relationship between the temperature of the heated operating fluid (referred to as the operated temperature) obtained by the cooling or heating in the control and the heating degree of the high temperature regenerator. The abnormal range setting means, the temperature of the absorbing liquid and the pressure of the refrigerant vapor in the high temperature regenerator, and the concentration of the concentrated liquid of the absorbing liquid in the circulation system or the corresponding value corresponding to this concentration is obtained. Each detection Any one of them is an excess amount detecting means for obtaining an amount (hereinafter, referred to as an excess amount) exceeding each preset reference value, and the heating degree by the control in the steady state based on the excess amount, Reduction control means for reducing the amount corresponding to the excess amount, and abnormality display means for displaying an abnormality when the relationship between the heating degree reduced by the reduction and the operated temperature is within the abnormal range. An absorption heat pump device comprising. 2. A circulation system for circulating a heat-operated fluid such as an absorption liquid and a refrigerant liquid via a plurality of heat exchange devices including a high temperature regenerator, and a required one of the heat exchange devices. An absorption heat pump device that provides a flow path through which the heated operating fluid that cools or heats is provided, and that performs the required control based on the detection value obtained by detecting the operating state of the required part. The abnormal range of the heating degree is set on the basis of the relationship between the temperature of the heated operating fluid (referred to as the operated temperature) obtained by the cooling or heating in the control and the heating degree of the high temperature regenerator. The abnormal range setting means, the temperature of the absorbing liquid and the pressure of the refrigerant vapor in the high temperature regenerator, and the concentration of the concentrated liquid of the absorbing liquid in the circulation system or the corresponding value corresponding to this concentration is obtained. Each detection Any one of them is an excess amount detecting means for obtaining an amount (hereinafter, referred to as an excess amount) exceeding each preset reference value, and the heating degree by the control in the steady state based on the excess amount, A first reduction control unit that performs a first heating reduction that reduces an amount corresponding to the excess amount, and a relationship between the heating degree that is reduced by the first heating reduction and the operated temperature is within the abnormal range. Second reduction control means for performing a second heating reduction for further reducing the heating degree by a predetermined amount when the time value obtained by measuring the included time exceeds a predetermined time value; After a predetermined time after performing the heating reduction, when any one of the detected values exceeds each preset upper limit value above each reference value, the abnormality of stopping the operation of the device is performed. And a stop control means. Heat pump equipment.